Question

Which one of the following species has plane triangular shape?

• A. $N_3^{-}$
• B. $N{O}_3^{-}$
• C. $N{O}_2^{-}$
• D. $C{O}_2$

Answer 1

The correct option is B $N{O}_3^{-}$

It has 3 $\sigma$ bond pair, so N has $s{p}^2$ hybridisation. Thus, its bond angle is ${120}^o$ and has plane triangular shape.

$N_3^{-}$ and $C{O}_2$ has linear shape.
$N{O}_2^{-}$ has bent shape.
Hence, option (b) is correct.